Locking device for dash-clocks.



T. B. STEPHENSON.

LOCKING DEVICE FOR DASH CLOCKS.

APPLICATION FILED JAN. 15. I915.

Ll$$fl3fiw Patented Apr. 27, 1915.

I12. NORRIS PETERS ca, PHOTO-LITHO.. WASHINGTUAL u.

THOMAS B. STEPHENSON, 0F FORESTVILLE, CONNECTICUT, ASSIGNOR TO THESESSIONS CLOCK COMPANY, OF FORESTVILLE, CONNECTICUT, A CORPORATION.

LOCKING DEVICE FOR DASH-CLOCKS.

Specification of Letters Patent.

Patented Apr. 27, 1915.

Application filed January 15, 1915. Serial No. 2,445.

T all whom it may concern:

Be it known that I, TrroMAs B. STEPHEN- soN, a citizen of the UnitedStates, residing at Forestville, in the county of Hartford and State ofConnecticut, have invented cer tain new and useful Improvements inLooking Devices for Dash-Clocks, of which the following is aspecification.

My invention relates to improvements in looking devices for dash clocks,and particularly to means for looking a clock to a dashboard forautomobiles, and the object of my improvement is simplicity and economyin construction and convenience and efficiency in use.

' In the accompanying drawing:Figure 1 is a front elevation of acombination of a bezel of a clock and the adjacent parts and asupporting ring embodying-my invention. Fig. 2 is a side elevation ofthe same. Fig. 3 is a rear elevation of the same. Fig. 1 is a sideelevation of the bezel alone. 'Fig. 5 is a front elevation of thesupporting ring alone. Fig. 6 is an inside view of a part of the latchand adjacent parts. Fig. 7 is a front elevation on an enlarged scale andin part broken out of certain parts shown in Fig. 1. Fig. 8 is a similarview of the same with the parts moved to an intermediate position. Fig.9 is a side elevation of part of the same. Fig. 10 is a similar viewwith the parts in a diflerent position.

The bezel 10 is an annular structure having means for receiving andsupporting the clock dial 11 and crystal 12 and for being connected tothe body portion of the clock,

and the bezel is receivable in the ring 13 that serves as a supporttherefor, and the said bezel and ring are locked together by my improvedlocking device. The said bezel 10 comprises a flat annular body portion14: havin g a plurality of holes 15 for engaging with the frame posts ofthe clock, the latter not being shown, and at the outer periphery of thesaid body portion 1 1 there is a forwardly extending cylindrical flange16, having at the extreme front edge portion an outwardly extending rim1?.

The dial 11 and crystal 1.2 are housed within the cylindrical flange 16,and are secured in place by means that are ordinary.

On the cylindrical flange 16 there is on one side, a radially directedpin 18, which is fixed and which serves as part of a bayonet jointconnection for securing the bezel 10 to the ring 13, the said pin 18being on the right side of the clock as viewed from the front, as shownin Fig. 1, the same being shown at the left in the rear view Fig. 3.Diametrically opposite the radial pin 18 is a radial latch pin 19 whichextends through a hole 20 in the side wall of the said cylindricalflange 16 and is mounted by its inner end on a spring 21. The spring 21is made of flat spring material, is curved to fit along the inner faceof the flange 16, and is secured by one end, shown as the lower end, tothe said flange 16 in any ordinary manner, as by a rivet 22. A secondradial pin 23 is also mounted on the spring 21, is positioned to oneside of the latch pin 19, being shown as below the same and separatedtherefrom by a small space, and passes outwardly through the hole 24 inthe flange 16.

The supporting ring 13 comprises a flat annular body portion 25 suitablefor being mounted on the front face of a dashboard and having a centralhole for admitting the body of the clock and having a cylindrical flange26 extending forwardiy'from the inner edge of the said hole, and whichis a fit for and suitable to receive the flange 16 on the bezel 10. Theflange 26 on the ring 13 is provided on diametrically opposite sideswith similar bayonet slots 29 comprising the longitudinally directedentrance portion 27 opening on the front edge, or extends from the saidfront edge rearwardly, and a laterally or circumferentially directedbranch portion 28 connecting with the said entrance portion 27 anddirected therefrom as shown in the clockwise direction.

The manner of engagement and disengagement of the radial pin 18 at theright side and the corresponding bayonet slot 29 is ordinary, the pinbeing an operative fit for the said slot and the engagement beingeffected in the usual manner by a slight longitudinal movement, with thepin 18 in the entrance portion 27 of the slot and then a turningmovement of the bezel 10 in the clockwise direction relatively to thering 13, and the release is effected by a reversal of the movementdescribed.

On the left side the movable latch pin 19 serves as the pin of thebayonet joint on this side in engagement with the bayonet slot 29. Thesaid latch pin 19 is of suflicient length to project through the hole 20and slot 29 appreciably, in normal position, as

,shown-in Fig. 7, solthat when the same is pushed inwardly the spring 21will be pushed inwardly away from the wall of the I flange 16. As thespring 21 is pushed in wardly asmentioned it carries with it the secondpin 23, which latter is also engaged with the bayonet slot 29. Themovement of the second pin 23 as described and the length of the sameare such that the same will be brought below the level of the outerflange 26, thus freeing the same from engagernent with the bayonet slot29.

The circumferential separation of the two pins19 and 23, which aremounted on the spring 21 is such that they fit in the circumferentialbranch 28 of the bayonet slot 29, asshownin Fig. 2, and when they arepositioned therein as shown in the said figure,

and also inFigL 7 they cooperate to prevent relative rotative movementof the bevel 10 and the ring 13.- In order to permit such rotativemovement and the separation of the. bezel 10 and ring 13 the latch pin19 I that during the movements-described the pin 18 on the right side isdisengaged from the corresponding bayonet slot 29.

In order to reassemble the parts the latch pin 19 is -depressed,.and isentered into the entrance portion 27 of the bayonet slide 29 until inline with the lateral branch 28, and

' the hold onthe latch pin 19 is released, permitting the second stoppin 23 to bear against the under side of the flange 26. Turning thebezel clockwise to the limit permitted by the latch pin 19 engaging withthe end wall of the branch portion 28 of the bayonet slot brings thestop pin 23 within'the limits of the slot, and the same is then forcedforwardly by the spring 21 into engagement with the said slot.

As described, there-are twozpins mounted on the latch spring 21 one ofthese, the latch pin 19, serving as the pin that cooperates with thebayonet slot 29 in operating asthe bayonet connectioncor joint, andthelother pin, the stop pin 23, serves in cooperation with the -otherpin 18' to lock the parts against rotative movement.

It Will be noted that the latch'pin 19 which serves as a push pin tounlock the Copies of this patent may be obtained for bezel or sash 10from the supporting ring or frame 13 serves for the double purpose of alock and a push pin.

I claim as my invention 1. A bezel and a supporting ring therefor, thesaid bezel having a cylindrical flange, the said ring having a flangeportion fitting over the said flange and provided with a bayonet slotcomposed of a longitudinally directed entrance portion and a lateralbranch connected with the said entrance portion, a spring mounted by oneend on the inner face of the said cylindrical flange, a pair of pinsmounted on the other end of the said spring, and suitably spaced to fitin the said lateral branch, the said other end having an inward movementsuiiicient to release one of the said pins from the said slot, and theother of the said pins being longer than the said first pin suitably toserve as an operating knob for effecting such movement of the saidspring and the said pins being so arranged that when they are engagedwith the said lateral branch of the bayonet slot the pin that serves asan operating knob will be out of alinement with the said entranceportion, whereby the said last named pin throughout the range ofmovement for, effecting the release of the mating pin will be positivelyengaged with the said lateral portion.

2. A circular sash for a clock face member, an annular supporting frametherefor, the said sash and frame having overlapping sleeve portions,one of the said sleeve portions having a bayonet slot comprising alongitudinally directed entrance portion and a laterally directedbranch, a spring mounted on the other of the said sleeve portions, apair of pins mounted on the said spring in spaced relation to fit in thesaid lateral branch, one of the said pins being short, suitably to bebrought out of engagement with the said slot when the said spring isdepressed and when in looking position being at the end of the saidlateral branch adjacent the said entrance portion, and the other of thesaid pins being positioned out of alinement with the said entranceportion and being of suflicient length to remain in engagement with thesaid lateral branch throughout the necessary movement for effecting therelease of the said short pin.

THOMAS B. STEPHENSON.

Witnesses:

GEO. W. W'HITTEMORE, C. B. SANFORD.

five cents each, by addressing the Commissioner of Patents,

Washingtonfl). O.

